These pictures all show that one end of the comet is brighter and apparently more dense than the other, and it is customary to call this bright part the head of the comet, while the brushlike appendage that streams away from it is called the comet's tail.
"A Text-Book of Astronomy"
George C. Comstock
Now, it is true that this man, with his mournful face, his huge, brushlike eyebrows, and his small, yellow eyes, startling by their incessant activity, had for the observer something enigmatical about him, and therefore did not inspire much confidence.
"The Clique of Gold"
Emile Gaboriau